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Build Inner
Strength

Smart fitness that flows with your natural rhythm

Sundial is a revolutionary smart dumbbell with integrated heating elements that creates progressive resistance training workouts timed to your circadian rhythm. The weight literally heats up during high-energy moments and cools during recovery.

✦ The Wow Moment:
You pick up the dumbbell at 6am on a winter morning - it's warm and welcoming, gently glowing like dawn light. As you work through your reps, the weight subtly heats to match your rising energy, and the app celebrates your first 'full sunrise' workout - you feel physically and mentally stronger, ready to face whatever comes your way.
Start Your Journey — $499

Includes 3 months of circadian workout programs + anti-bullying community access